I just registered for mojang account for minecraft pocket edition, and when I went to choose a name, every single one was taken. I mean every single one, from my standard name to completely random jumbles of letters and numbers, I've tried about 50 completely random jumbles (basically randomly typing letters) and they're all taken.
Update: This only occurs when minecraft servers are down. Due to this not being stated by the name chooser it gives off a fake idea that all names are taken. and should be updated to give a non-confusing error.
Updated to include more info.